My Pagoda Cup, red/green Zoa, and white zombie eye Zoa have been closed or partially closed for months now. I’ve got around 55 other coral in my 300g who are doing well. I did have issues with some coral starting to show skeleton/dying for a time as I was doing no water change experiments with other nutrient export, but recently did four 33% 100 gallon water changes over the last month, and now all other coral look great, growing back, and growing fast. These particular coral are still closed. Any thoughts? Pics and chemistry below including the eagle eyes Zoa to show that other coral look great.
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Something to add is that I've been fighting LCA Dinos for like 5 months which many say are lower toxicity, but since my coral were struggling up until recently, I am thinking my very sparse water change experiment + dino toxin buildup? Maybe was what hurt my corals originally. I finally have kind of defeated the LCA dinos with enducing a dino bloom using silica dosing, but after pulling the silica dosing back, now I think I have SCA small cell amphidinium outbreak lol. This is only over last week though. 
